I love it!
I have been thinking about doing something like that, but haven't been able to figure out exactly where to cut the grip frame, how much to shorten it and so on. I figure it will take some measuring and head scratching to make sure the spring will still fit, figure out how much the mag can be shortened and so on. I don't want to reinvent the wheel, so do you have any dimensions and/or project pictures so we can get an idea of how it's done?